What I quite like was the letter G wrote right before the final WDF/GENOM showdown. Five minutes before the shooting starts, the fleet would be moving out of the Sphere. Heck, it would have been after G spoke to T'Pol and gave her the after-battle orders.

I get this image of him in the turbolift to Concordias bridge, writing his final letter to Tali. It really gives an impression of how close they still are, even when life and duty keeps a physical distance between them.

Matrix Dragon, J. Random Nutter